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Message: <blockquote data-quote="pigoo3" data-source="post: 1324706" data-attributes="member: 56379">Be careful what you read.  The battery's on older Apple laptops have an approx. 300 cycle battery life...and on newer Apple laptops the battery life is 1000 cycles.Also...where did you read "80% battery life with 300 cycles is still good for a macbook"?  If you apply what I mentioned above...with an older (user replaceable battery with a 300 battery cycle life)...there's no way you would have 80% remaining.  If it was a newer laptop (with the non-user replaceable battery with a 1000 cycle battery life)...1000-300 = 700.  (700/1000) x 100 = 70% So 80% versus 70%...I'm sure there's some flexibility between individual batteries.  80% at 300 cycles I would say would be optimistic...since 70% life remaining after 300 cycles is what would be more normally expected.- Nick</blockquote>